EP3749349A1 - Mutant idh1 specific t cell receptor - Google Patents
Mutant idh1 specific t cell receptorInfo
- Publication number
- EP3749349A1 EP3749349A1 EP19751687.5A EP19751687A EP3749349A1 EP 3749349 A1 EP3749349 A1 EP 3749349A1 EP 19751687 A EP19751687 A EP 19751687A EP 3749349 A1 EP3749349 A1 EP 3749349A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tcr
- sequence
- seq
- fragment
- nucleic acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Classifications
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
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- C07K14/7051—T-cell receptor (TcR)-CD3 complex
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- A61P35/00—Antineoplastic agents
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/06—Animal cells or tissues; Human cells or tissues
- C12N5/0602—Vertebrate cells
- C12N5/0634—Cells from the blood or the immune system
- C12N5/0636—T lymphocytes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0006—Oxidoreductases (1.) acting on CH-OH groups as donors (1.1)
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
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- C07K2317/565—Complementarity determining region [CDR]
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
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- C12N2740/10043—Use of virus, viral particle or viral elements as a vector viral genome or elements thereof as genetic vector
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
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- C12N2740/16043—Use of virus, viral particle or viral elements as a vector viral genome or elements thereof as genetic vector
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
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- C12Y101/01—Oxidoreductases acting on the CH-OH group of donors (1.1) with NAD+ or NADP+ as acceptor (1.1.1)
- C12Y101/01041—Isocitrate dehydrogenase (NAD+) (1.1.1.41)
Definitions
- Gliomas are the most common type of primary brain tumors. This group of tumors includes a number of specific histologies, the most common of which are astrocytomas, oligodendrogliomas, and ependymomas.
- Isocitrate dehydrogenase 1 catalyzes the oxidative decarboxylation of isocitrate to alpha-ketoglutarate by coupling the reaction to the reduction of NADP+ to NADPH.
- IDH1 mutations occur at a high frequency in WHO grade II and III diffuse gliomas, and 93% of all IDH1 mutations are characterized by the amino acid change R132H (Hartmann 2009, ActaNeuropathol. H8(4):469-74).
- the arginine at position 132 of the amino acid sequence of IDH1 is located in an evolutionarily conserved isocitrate-binding site.
- TCRs T cell receptors
- TCR T cell receptors
- the mutant IDH1 peptide fragment comprises an R132H mutation.
- the TCR, or fragment thereof comprises one or more (e.g., one, two, three, four, five, or six) amino acid sequences set forth in SEQ ID NOs: 4, 6, 8, 12, 14, 16, 20, 22, 24, 28, 30, 32, 36, 38, and 40, and variants thereof.
- the TCR, or fragment thereof comprises an amino acid sequence set forth in SEQ ID NO: 2, 18, or 34, or a variant thereof; and/or an amino acid sequence set forth in SEQ ID NO: 10 or 26, or a variant thereof.
- nucleic acid molecules encoding any of the TCRs disclosed herein, or a fragment thereof are also provided.
- the host cells can, for example, be T cells.
- compositions comprising a host cell disclosed herein and/or a TCR disclosed herein, or a fragment thereof; and methods of treating a patient by administering to the patient such a pharmaceutical composition.
- the patient for example, can be suffering from a cancer, such as a glioma (e.g., a diffuse glioma, which may be a diffuse low-grade glioma).
- a glioma e.g., a diffuse glioma, which may be a diffuse low-grade glioma.
- Figure 1 depicts pie charts showing the relative abundance of different types of TRAV and TRBV alleles detected upon sequencing T cell populations selectively expanded in the presence of IDH1 R132H mutant peptide according to certain embodiments.
- Al, A3, A5, Cl, C3, and C5 designate individual wells from which the expanded T cell populations were obtained.
- Figure 2 depicts FACS results of Jurkat 76 cells transfected with the 26-9 TCR clone, according to one embodiment.
- Figures 3A-3B depict bar graphs showing significant elevation of TNF-a (3 A) and IFN-g (3B) levels in cell culture supernatants from transfected CD4 + T cells expressing the 26-9 TCR clone, when exposed to IDH1 R132H mutant peptide as compared to control IDH1 wild-type peptide, according to one embodiment.
- Figure 3C depicts a bar graph showing significant elevation of IL-2 levels in cell culture supernatant from transfected CD4+ T cells expressing the 26-9 TCR clone, when exposed to IDH1 R132H mutant peptide as compared to control IDH1 wild-type peptide.
- Figure 4 depicts a bar graph showing significant elevation of TNF-a levels in cell culture supernatants from transfected CD4 + T cells expressing the 16-9 TCR clone, when exposed to IDH1 R132H mutant peptide (“mut pep”) as compared to control IDH1 wild-type peptide (“wt pep”), according to one embodiment.
- reference to“about” a value or parameter herein includes (and describes) embodiments that are directed to that value or parameter per se.
- description referring to“about X” includes description of “X.”
- nucleic acid molecule “nucleic acid” and“polynucleotide” may be used interchangeably and refer to a polymer of nucleotides. Such polymers of nucleotides may contain natural and/or non-natural nucleotides, and include, but are not limited to, DNA, RNA, and PNA.“Nucleic acid sequence” refers to the linear sequence of nucleotides that comprise the nucleic acid molecule or polynucleotide.
- polypeptide and“protein” are used interchangeably to refer to a polymer of amino acid residues and are not limited to a minimum length.
- Such polymers of amino acid residues may contain natural or non-natural amino acid residues and include, but are not limited to, peptides, oligopeptides, dimers, trimers, and multimers of amino acid residues. Both full-length proteins and fragments thereof are encompassed by the definition.
- the terms also include post-translational modifications of the polypeptide, for example, glycosylation, sialylation, acetylation, phosphorylation, and the like.
- a“polypeptide” refers to a protein which includes modifications, such as deletions, additions and substitutions (generally conservative in nature), to the native sequence, as long as the protein maintains the desired activity. These modifications may be deliberate, as through site-directed mutagenesis, or may be accidental, such as mutations introduced by host organisms used to clone DNA or express proteins or errors due to PCR amplification.
- the term“specifically binds” to an antigen or epitope is a term that is well understood in the art, and methods to determine such specific binding are also well known in the art.
- a molecule is said to exhibit“specific binding” or“preferential binding” if it reacts or associates more frequently, more rapidly, with greater duration and/or with greater affinity with a particular cell or substance than it does with alternative cells or substances.
- an antibody that specifically or preferentially binds to a PD-l epitope is an antibody that binds this epitope with greater affinity, avidity, more readily and/or with greater duration than it binds to other PD-l epitopes or non-PD-l epitopes. It is also understood by reading this definition that, for example, an antibody (or moiety or epitope) that specifically or preferentially binds to a first target may or may not specifically or preferentially bind to a second target. As such,“specific binding” or“preferential binding” does not necessarily require (although it can include) exclusive binding. Generally, but not necessarily, reference to binding means preferential binding. “Specificity” refers to the ability of a binding protein to selectively bind an antigen.
- substantially pure refers to material which is at least 50% pure (that is, free from contaminants), more preferably, at least 90% pure, more preferably, at least 95% pure, yet more preferably, at least 98% pure, and most preferably, at least 99% pure.
- Isocitrate dehydrogenase Type 1 or“IDHl” as used herein refers to an enzyme which is physiologically involved in the citric acid cycle in that it catalyzes the oxidative decarboxylation of isocitrate whereby alpha-ketoglutarate and CO2 are produced.
- the reaction requires the conversion of NAD + to NADH.
- Another isoform of the enzyme disclosed herein catalyzes the same reaction in the cytosol as well as in mitochondria and peroxisomes using NADP + as a cofactor rather than NAD + .
- IDH1 as referred to herein preferably, is human IDH1 having an amino acid sequence as disclosed in Kim et al.
- “Fragment” means an immunogenically effective subset of the amino acid sequence that comprises a T cell receptor (TCR).
- TCR T cell receptor
- the term is intended to include such fragments in conjunction with or combined with additional sequences or moieties, for example, where the peptide is coupled to other amino acid sequences or to a carrier.
- the term“subject” as used herein relates to animals, preferably mammals, and, more preferably, humans.
- the methods disclosed herein will be applied to subjects suspected to either suffer from any of the aforementioned cancer types in light of clinically apparent symptoms or subjects suspected to suffer from said cancer due to a potential increased predisposition.
- TCR T cell receptor
- the mutant IDH1 protein or fragment thereof comprises an R132H mutation.
- the TCR disclosed herein does not bind to an IDH1 protein comprising an arginine at amino acid position 132 (i.e.. an arginine instead of a histidine at position 132 of SEQ ID NO: 42) or fragment thereof comprising the arginine at position 132 (i.e., position 132 according to the full-length IDH1 sequence).
- the disclosed TCR polypeptide or fragment thereof binds to an R132H mutant of IDH1 or a fragment of IDH1 comprising the R132H mutation when the R132H mutant of IDH 1 or a fragment of IDH1 comprising the R132H mutation is bound to a major histocompatibility (MHC) molecule.
- MHC major histocompatibility
- the TCRs disclosed herein comprise one or more immature TCR chains comprising a leader sequence, such as a signal sequence, or one or more mature chains in which the leader sequence has been cleaved off.
- the signal sequence of a TCR chain comprises the amino acids at the N-terminus which together serve as a signal to transport the TCR to the plasma membrane and which amino acids are cleaved off to yield the mature form of the TCR.
- a TCR complex comprising at least two TCRs as disclosed herein.
- any of the TCRs, proteins, or polypeptides disclosed herein can be isolated, substantially pure, and/or recombinantly expressed.
- a protein comprising a TCR alpha chain, or a fragment thereof, and/or a TCR beta chain or a fragment thereof, wherein said alpha chain or beta chain or fragment thereof comprises one or more amino acid sequences represented by SEQ ID NOs: 4, 6, 8, 12, 14, 16, 20, 22, 24, 28, 30, 32, 36, 38, and 40, and variants thereof.
- the protein comprises one or more amino acid sequences represented by SEQ ID NOs: 2, 10, 18, 26, and 34, and variants thereof.
- Another embodiment disclosed herein provides protein comprising one or more amino acid sequences represented by SEQ ID NOs: 8, 16, 24, 32, and 40, and variants thereof.
- the TCR proteins disclosed herein can comprise an a and a b chain.
- a TCR protein disclosed herein can comprise a first polypeptide chain comprising the amino acid sequence of SEQ ID NO: 2, 18, or 34 (an a chain), and a second polypeptide chain comprising the amino acid sequence of SEQ ID NO: 10 or 26 (a b chain).
- a TCR protein disclosed herein can, for example, comprise a first polypeptide chain comprising the amino acid sequence of SEQ ID NO: 2 (an a chain) and a second polypeptide chain comprising the amino acid sequence of SEQ ID NO: 10 (a b chain).
- a TCR protein disclosed herein can, for example, comprise a first polypeptide chain comprising the amino acid sequence of SEQ ID NO: 34 (an a chain) and a second polypeptide chain comprising the amino acid sequence of SEQ ID NO: 10 (a b chain).
- a TCR protein disclosed herein can, for example, comprise a first polypeptide chain comprising the amino acid sequence of SEQ ID NO: 18 (an a chain) and a second polypeptide chain comprising the amino acid sequence of SEQ ID NO: 26 (a b chain).
- the TCR disclosed herein comprises SEQ ID NO: 2, 10, 18, 26, or 34.
- a TCR disclosed herein comprises any alpha chain disclosed herein with any other beta chain disclosed herein.
- a TCR or protein disclosed herein comprises at least one sequence selected from SEQ ID NOs: 4, 6, 8, 12, 14, 16, 20, 22, 24, 28, 30, 32, 36, 38, and 40, and variants thereof.
- a protein disclosed herein comprises at least two, three, four, five, six, seven, eight, nine, ten, eleven, or twelve sequences selected from SEQ ID NOs: 4, 6, 8, 12, 14, 16, 20, 22, 24, 28, 30, 32, 36, 38, and 40, and variants thereof.
- a TCR or protein disclosed herein comprises a CDR3 amino acid sequence selected from SEQ ID NOs: 8, 16, 24, 32, and 40, and variants thereof. In some embodiments, a TCR or protein disclosed herein comprises a CDR2 amino acid sequence selected from SEQ ID NOs: 6, 14, 22, 30, and 38, and variants thereof. In some embodiments, a TCR or protein disclosed herein comprises a CDR1 amino acid sequence selected from SEQ ID NOs: 4, 12, 20, 28, and 36, and variants thereof.
- a TCR or protein disclosed herein comprises SEQ ID NOs: 4, 6 and 8. In some embodiments, a TCR or protein disclosed herein comprises SEQ ID NOs: 12, 14 and 16. In some embodiments, a TCR or protein disclosed herein comprises SEQ ID NOs: 20, 22 and 24. In some embodiments, a TCR or protein disclosed herein comprises SEQ ID NOs: 28, 30 and 32. In some embodiments, a TCR or protein disclosed herein comprises SEQ ID NOs: 36, 38 and 40.
- a TCR or protein disclosed herein comprises the sequence of SEQ ID NO: 2, 18, 34, or a variant thereof, coding for the a-chain of the TCR, and/or the sequence of SEQ ID NO: 10, 26, or a variant thereof, coding for the b-chain of the TCR.
- a variant is at least about 80%, 85%, 90%, 95%, or 99% identical to at least 60%, 70%, 80%, 90%, or 100% of SEQ ID NO: 2, 10, 18, 26, or 34, or has one, two, three, four, five, six, or seven amino acid differences from the recited sequences.
- the protein comprises SEQ ID NOs: 2 and 10. In some embodiments, the protein comprises SEQ ID NOs: 34 and 10. In some embodiments, the protein comprises SEQ ID NOs: 18 and 26.
- TCR or fragment thereof, polypeptide, or protein disclosed herein can consist essentially of the specified amino acid sequence or sequences described herein, such that other components e.g., other amino acids, do not materially change the biological activity of the functional variant.
- the TCRs, fragments thereof, polypeptides, and proteins disclosed herein can be of any length, i.e., can comprise any number of amino acids, provided that the TCRs, polypeptides, or proteins (or functional portions or functional variants thereof) retain their biological activity, e.g., the ability to specifically bind to mutant IDH1 protein.
- the polypeptide can be about 50 to about 5000 amino acids long, such as 50, 70, 75, 100, 125, 150, 175, 200, 300, 400, 500, 600, 700, 800, 900, 1000 or more amino acids in length.
- the polypeptides disclosed herein also include oligopeptides.
- the TCRs, fragments thereof, polypeptides, and proteins disclosed herein can comprise synthetic amino acids in place of one or more naturally-occurring amino acids.
- synthetic amino acids include, for example, aminocyclohexane carboxylic acid, norleucine, a-amino n- decanoic acid, homoserine, S-acetylaminomethyl-cysteine, trans-3- and trans-4- hydroxyproline, 4-aminophenylalanine, 4-nitrophenylalanine, 4-chlorophenylalanine, 4- carboxyphenylalanine, b-phenylserine b-hydroxyphenylalanine, phenylglycine, a- naphthylalanine, cyclohexylalanine, cyclohexylglycine, indoline-2-carboxylic acid, 1, 2,3,4- tetrahydroisoquinoline-3
- TCRs, fragments thereof, polypeptides, and proteins disclosed herein can be, for example, glycosylated, amidated, carboxylated, phosphorylated, esterified, N-acylated, cyclized via, e.g., a disulfide bridge, or converted into an acid addition salt and/or optionally dimerized or polymerized, or conjugated.
- the polypeptides may be in the form of a pharmaceutically acceptable salt.
- pharmaceutically acceptable acid addition salts include those derived from mineral acids, such as hydrochloric, hydrobromic, phosphoric, metaphosphoric, nitric, and sulphuric acids, and organic acids, such as tartaric, acetic, citric, malic, lactic, fumaric, benzoic, glycolic, gluconic, succinic, and arylsulphonic acids, for example, p-toluenesulphonic acid.
- mineral acids such as hydrochloric, hydrobromic, phosphoric, metaphosphoric, nitric, and sulphuric acids
- organic acids such as tartaric, acetic, citric, malic, lactic, fumaric, benzoic, glycolic, gluconic, succinic, and arylsulphonic acids, for example, p-toluenesulphonic acid.
- a protein disclosed herein can be a recombinant antibody comprising at least one of the polypeptides described herein.
- “recombinant antibody” refers to a recombinant (e.g., genetically engineered) protein comprising at least one of the polypeptides disclosed herein and a polypeptide chain of an antibody, or a portion thereof.
- the polypeptide of an antibody, or portion thereof can be a heavy chain, a light chain, a variable or constant region of a heavy or light chain, a single chain variable fragment (scFv), or an Fc, Fab, or F(ab')2 fragment of an antibody, etc.
- polypeptide chain of an antibody, or portion thereof can exist as a separate polypeptide of the recombinant antibody.
- the polypeptide chain of an antibody, or portion thereof can exist as a polypeptide, which is expressed in frame (in tandem) with a polypeptide disclosed herein.
- the polypeptide of an antibody, or portion thereof can be a polypeptide of any antibody or any antibody fragment, including any of the antibodies and antibody fragments described herein.
- a recombinant antibody comprises a sequence selected from SEQ ID NOs: 4,
- мно variants include a TCR, polypeptide, or protein having substantial or significant sequence identity or similarity to a parent TCR, polypeptide, or protein, which functional variant retains the biological activity of the TCR, polypeptide, or protein of which it is a variant.
- Functional variants encompass, for example, those variants of the TCR, polypeptide, or protein described herein (the parent TCR, polypeptide, or protein) that retain the ability to specifically bind to a mutant R132H IDH1 polypeptide, or fragment thereof comprising the R132H mutation, for which the parent TCR has antigenic specificity or to which the parent polypeptide or protein specifically binds, to a similar extent, the same extent, or to a higher extent, as the parent TCR, polypeptide, or protein.
- the functional variant can, for instance, be at least about 30%, 50%, 75%, 80%, 90%, 95%, 96%, 97%, 98%, 99% or more identical in amino acid sequence to the parent TCR, polypeptide, or protein over the length of the variant.
- a variant is at least about 80%, 85%, 90%, 95%, or 99% identical to at least 60%, 70%, 80%, 90%, or 100% of SEQ ID NO: 2, 10, 18, 26, or 34 over the length of the variant.
- a variant has one, two, three, four, five, six, or seven amino acid changes compared to SEQ ID NO: 4, 6, 8, 12, 14, 16, 20, 22, 24, 28, 30, 32, 36, 38, or 40 over the length of the variant.
- the functional variant can, for example, comprise the amino acid sequence of the parent TCR, fragment, polypeptide, or protein with at least one conservative amino acid substitution.
- Conservative amino acid substitutions are known in the art and include amino acid substitutions in which one amino acid having certain physical and/or chemical properties is exchanged for another amino acid that has the same chemical or physical properties.
- the conservative amino acid substitution can be an acidic amino acid substituted for another acidic amino acid (e.g., Asp or Glu), an amino acid with a nonpolar side chain substituted for another amino acid with a nonpolar side chain (e.g., Ala, Gly, Val, Ile, Leu, Met, Phe, Pro, Trp, Val, etc.), a basic amino acid substituted for another basic amino acid (Lys, Arg, etc.), an amino acid with a polar side chain substituted for another amino acid with a polar side chain (Asn, Cys, Gln, Ser, Thr, Tyr, etc.), etc.
- an amino acid with a polar side chain substituted for another amino acid with a polar side chain e.g., Asp or Glu
- an amino acid with a nonpolar side chain substituted for another amino acid with a nonpolar side chain e.g., Ala, Gly, Val, Ile, Leu, Met, Phe, Pro, Trp, Val, etc
- the functional variants can comprise the amino acid sequence of the parent TCR, polypeptide, or protein with at least one non-conservative amino acid substitution.
- the non-conservative amino acid substitution it is preferable for the non-conservative amino acid substitution to not interfere with or inhibit the biological activity of the functional variant.
- the non-conservative amino acid substitution enhances the biological activity of the functional variant, such that the biological activity of the functional variant is increased as compared to the parent TCR, polypeptide, or protein.
- conjugates e.g., bioconjugates, comprising any of the inventive TCRs, polypeptides, or proteins disclosed herein (including any of the functional variants thereof).
- Conjugates, as well as methods of synthesizing conjugates in general, are known in the art (See, for instance, Hudecz, R, Methods Mol. Biol. 298: 209-223 (2005) and Kirin et al, Inorg Chem. 44(15): 5405-5415 (2005)).
- the T Cell Receptor is associated with a detectable label, a therapeutic agent, a pharmacokinetic modifying moiety, or a combination of any of these.
- a fusion protein comprising at least one of the polypeptides described herein fused with at least one other polypeptide.
- the other polypeptide can, for example, be expressed in frame (in tandem) with a polypeptide described herein.
- the other polypeptide can be any protein, or a portion thereof (e.g., a domain), including, but not limited to an immunoglobulin domain, CD3, CD4, CD8, an MHC molecule, a CD1 molecule, e.g., CDla, CDlb, CDlc, CDld, etc.
- the other polypeptide can encode a detectable label, such as an enzymatic label (for example, horseradish peroxidase, luciferase, alkaline phosphatase) or a predetermined polypeptide epitope recognized by a secondary reporter (for example, leucine zipper pair sequences, binding sites for secondary antibodies, metal binding domains, epitope tags, etc.).
- a detectable label such as an enzymatic label (for example, horseradish peroxidase, luciferase, alkaline phosphatase) or a predetermined polypeptide epitope recognized by a secondary reporter (for example, leucine zipper pair sequences, binding sites for secondary antibodies, metal binding domains, epitope tags, etc.).
- a functional TCR a- and b- chain fusion protein is also fused to an epitope tag.
- such a functional TCR a- and b- chain fusion protein comprises any of the exemplary polypeptide sequences disclosed herein.
- a nucleic acid comprising a nucleotide sequence that encodes any of the TCRs, polypeptides, and proteins herein.
- a nucleic acid molecule encoding an alpha and/or beta chain of a T-cell receptor (TCR) or a fragment thereof, wherein the TCR or fragment thereof binds to an R132H mutant of isocitrate dehydrogenase type 1 (IDH1) or a fragment of IDH1 comprising the R132H mutation, or a complementary nucleic acid molecule thereof.
- TCR T-cell receptor
- IDH1 isocitrate dehydrogenase type 1
- the TCR does not bind to IDH1 comprising an arginine at amino acid position 132.
- the nucleotide sequence is codon-optimized or comprises a codon-optimized portion.
- the codon-optimized portion may comprise, consist, or consist essentially of an alpha or beta chain of a TCR disclosed herein, or a variable region thereof.
- the nucleic acids disclosed herein are recombinant.
- the term“recombinant” refers to (i) molecules that are constructed outside living cells by joining natural or synthetic nucleic acid segments to nucleic acid molecules that can replicate in a living cell, or (ii) molecules that result from the replication of those described in (i) above.
- the replication can be in vitro replication or in vivo replication.
- the nucleic acid can comprise variants thereof described herein.
- the nucleotide sequence comprises, consists, or consists essentially of any of SEQ ID NOs: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, and 39.
- the nucleic acid comprises at least one of SEQ ID NOs: 1, 7, 9, 15, 17, 23, 25, 31, 33, and 39, and variants thereof.
- a nucleic acid molecule disclosed herein comprises at least one sequence selected from SEQ ID NOs: 7, 15, 23, 31, and 39.
- a nucleic acid molecule disclosed herein comprises a sequence selected from SEQ ID NOs: 3, 11, 19, 27, and 35, and variants thereof.
- a nucleic acid molecule disclosed herein comprises a sequence selected from: SEQ ID NOs: 5, 13, 21, 29, and 37, and variants thereof.
- a nucleic acid molecule disclosed herein comprises SEQ ID NOs: 3, 5 and 7. In some embodiments, a nucleic acid molecule disclosed herein comprises SEQ ID NOs: 11, 13 and 15. In some embodiments, a nucleic acid molecule disclosed herein comprises SEQ ID NOs: 19, 21 and 23. In some embodiments, a nucleic acid molecule disclosed herein comprises SEQ ID NOs: 27, 29 and 31. In some
- a nucleic acid molecule disclosed herein comprises SEQ ID NOs: 35, 37 and 39. In some embodiments, a nucleic acid molecule comprises the nucleic acid sequence of at least one of SEQ ID NOs: 1, 9, 17, 25, and 33.
- a nucleic acid molecule comprises SEQ ID NO: 1, or a variant thereof, and SEQ ID NO: 9, or a variant thereof. In some embodiments, a nucleic acid molecule comprises SEQ ID NO: 33, or a variant thereof, and SEQ ID NO: 9, or a variant thereof. In some embodiments, a nucleic acid molecule comprises SEQ ID NO: 17, or a variant thereof, and SEQ ID NO: 25, or a variant thereof. In some embodiments, a nucleic acid molecule comprises SEQ ID NOs: 1 and 9. In some embodiments, a nucleic acid molecule comprises SEQ ID NOs: 33 and 9. In some embodiments, a nucleic acid molecule comprises SEQ ID NOs: 17 and 25.
- a nucleic acid molecule disclosed herein comprises the nucleic acid sequence of at least one of SEQ ID NOs: 1, 9, 17, 25, and 33, and variants thereof.
- a variant is at least 80%, 85%, 90%, 95%, or 99% identical to at least 60%, 70%, 80%, 90%, or 100% of SEQ ID NO: 1, 9, 17, or 25 over the length of the variant.
- nucleic acid comprising a nucleotide sequence that is at least about 70% or more, e.g., about 80%, about 90%, about 91%, about 92%, about 93%, about 94%, about 95%, about 96%, about 97%, about 98%, or about 99% identical to any of the nucleic acids described herein over the length of the variant.
- variants may comprise from 1 to 21 nucleic acid differences from the recited SEQ ID NOs, over the length of the variant.
- nucleic acid comprising a nucleotide sequence which is complementary to the nucleotide sequence of any of the nucleic acids described herein or a nucleotide sequence which hybridizes under stringent conditions to the nucleotide sequence of any of the nucleic acids described herein.
- the nucleotide sequence which hybridizes under stringent conditions preferably hybridizes under high stringency conditions.
- high stringency conditions is meant that the nucleotide sequence specifically hybridizes to a target sequence (the nucleotide sequence of any of the nucleic acids described herein) in an amount that is detectably stronger than non-specific hybridization.
- High stringency conditions include conditions which would distinguish a polynucleotide with an exact complementary sequence, or one containing only a few scattered mismatches from a random sequence that happened to have a few small regions (e.g., 3-10 bases) that matched the nucleotide sequence. Such small regions of
- Relatively high stringency conditions would include, for example, low salt and/or high temperature conditions, such as provided by about 0.02-0.1 M NaCl or the equivalent, at temperatures of about 50-70°C.
- Such high stringency conditions tolerate little, if any, mismatch between the nucleotide sequence and the template or target strand and are particularly suitable for detecting expression of any of the inventive TCRs (including functional portions and functional variants thereof). It is generally appreciated that conditions can be rendered more stringent by the addition of increasing amounts of formamide.
- the nucleotide sequence may be codon-optimized. Without being bound to a particular theory or mechanism, it is believed that codon optimization of the nucleotide sequence increases the translation efficiency of the mRNA transcripts. Codon optimization of the nucleotide sequence may involve substituting a native codon for another codon that encodes the same amino acid, but can be translated with a tRNA that is more readily available within a cell, thus increasing translation efficiency. Optimization of the nucleotide sequence may also reduce secondary mRNA structures that would interfere with translation, thus increasing translation efficiency.
- nucleic acid as used herein includes“polynucleotide,”“oligonucleotide,” and“nucleic acid molecule,” and generally means a polymer of DNA or RNA, which can be single-stranded or double-stranded, synthesized or obtained (e.g., isolated and/or purified) from natural sources, which can contain natural, non-natural or altered nucleotides, and which can contain a natural, non- natural or altered intemucleotide linkage, such as a phosphoroamidate linkage or a phosphorothioate linkage, instead of the phosphodiester found between the nucleotides of an unmodified oligonucleotide.
- the nucleic acid comprises complementary DNA (cDNA).
- the nucleic acids can be constructed based on chemical synthesis and/or enzymatic ligation reactions using procedures known in the art.
- the nucleic acid comprises a non-natural nucleotide sequence.
- a nucleotide sequence may be considered to be“non-natural” if the nucleotide sequence is not found in nature.
- a nucleic acid can be chemically synthesized using naturally occurring nucleotides or variously modified nucleotides designed to increase the biological stability of the molecules or to increase the physical stability of the duplex formed upon hybridization (e.g., phosphorothioate derivatives and acridine substituted nucleotides).
- nucleotides that can be used to generate the nucleic acids include, but are not limited to, 5-fluorouracil, 5- bromouracil, 5- chlorouracil, 5-iodouracil, hypoxanthine, xanthine, 4-acetylcytosine, 5- (carboxyhydroxymethyl) uracil, 5-carboxymethylaminomethyl-2-thiouridine, 5- carboxymethylaminomethyluracil, dihydrouracil, beta-D-galactosylqueosine, inosine, N6- isopentenyladenine, 1 -methylguanine, l-methylinosine, 2,2-dimethylguanine, 2- methyladenine, 2-methylguanine, 3-methylcytosine, 5-methylcytosine, N6-substituted adenine, 7-methylguanine, 5-methylaminomethyluracil, 5-methoxyaminomethyl-2-thiouracil, beta-D-mannosylque
- nucleic acid molecules disclosed herein can be isolated or substantially pure.
- nucleic acids disclosed herein can be incorporated into a recombinant expression vector.
- recombinant expression vectors comprising any of the nucleic acids disclosed herein.
- the recombinant expression vector comprises a nucleotide sequence encoding the a chain, the b chain, and linker peptide.
- the term“recombinant expression vector” means a genetically-modified oligonucleotide or polynucleotide construct that permits the expression of an mRNA, protein, polypeptide, or peptide by a host cell, when the construct comprises a nucleotide sequence encoding the mRNA, protein, polypeptide, or peptide, and the vector is contacted with the cell under conditions sufficient to have the mRNA, protein, polypeptide, or peptide expressed within the cell.
- the vectors disclosed herein are not naturally-occurring as a whole. However, parts of the vectors can be naturally-occurring.
- the inventive recombinant expression vectors can comprise any type of nucleotides, including, but not limited to DNA and RNA, which can be single-stranded or double-stranded, synthesized or obtained in part from natural sources, and which can contain natural, non-natural or altered nucleotides.
- the recombinant expression vectors can comprise naturally-occurring, non- naturally-occurring intemucleotide linkages, or both types of linkages.
- the non- naturally occurring or altered nucleotides or intemucleotide linkages does not hinder the transcription or replication of the vector.
- the recombinant expression vector disclosed herein can be any suitable recombinant expression vector and can be used to transform or transfect any suitable host cell.
- Suitable vectors include those designed for propagation and expansion or for expression or both, such as plasmids and viruses.
- vectors include the pUC series (Fermentas Life Sciences), the pBluescript series (Stratagene, LaJolla, CA), the pET series (Novagen, Madison, WI), the pGEX series (Pharmacia Biotech, Uppsala, Sweden), and the pEX series (Clontech, Palo Alto, CA).
- Bacteriophage vectors such as XGTIQ, XGT1 1, LZa II (Stratagene), lEMBIA and lNMI 149, also can be used.
- plant expression vectors include pBIOl, pBHOl.2, pBHOl.3, pBH2l and rBIN19 (Clontech).
- animal expression vectors include pEUK-Cl, pMAM and pMAMneo (Clontech).
- the recombinant expression vector is a viral vector, e.g., a retroviral or lentiviral vector.
- the recombinant expression vector is an MSGV1 vector.
- the recombinant expression vectors disclosed herein can be prepared using standard recombinant DNA techniques. Constructs of expression vectors, which are circular or linear, can be prepared to contain a replication system functional in a prokaryotic or eukaryotic host cell. Replication systems can be derived, e.g., from ColEl, 2 m plasmid, l, SV40, bovine papillomavirus, and the like.
- the recombinant expression vector comprises regulatory sequences, such as transcription and translation initiation and termination codons, which are specific to the type of host cell (e.g., bacterium, fungus, plant, or animal) into which the vector is to be introduced, as appropriate and taking into consideration whether the vector is DNA or RNA based.
- regulatory sequences such as transcription and translation initiation and termination codons, which are specific to the type of host cell (e.g., bacterium, fungus, plant, or animal) into which the vector is to be introduced, as appropriate and taking into consideration whether the vector is DNA or RNA based.
- the recombinant expression vector can include one or more marker genes, which allow for selection of transformed or transfected host cells.
- Marker genes include biocide resistance, e.g., resistance to antibiotics, heavy metals, etc., complementation in an auxotrophic host cell to provide prototrophy, and the like.
- Suitable marker genes for the inventive expression vectors include, for instance, neomycin/G4l8 resistance genes, hygromycin resistance genes, histidinol resistance genes, tetracycline resistance genes, and ampicillin resistance genes.
- the recombinant expression vector can comprise a native or normative promoter operably linked to the nucleotide sequence encoding the TCR, polypeptide, or protein (including functional variants thereof), or to the nucleotide sequence which is complementary to or which hybridizes to the nucleotide sequence encoding the TCR, polypeptide, or protein (including functional variants thereof).
- the selection of promoters e.g., strong, weak, inducible, tissue-specific and developmental-specific, is within the ordinary skill of the artisan.
- the combining of a nucleotide sequence with a promoter is also within the skill of the artisan.
- the promoter can be a non- viral promoter or a viral promoter, e.g., b-actin promoter, SV40 early and late promoter, immunoglobulin promoter, human cytomegalovirus promoter, and retro viral LTRs.
- the recombinant expression vector comprises an inducible or constitutive promoter.
- the inventive recombinant expression vectors can be designed for either transient expression, for stable expression, or for both. Also, the recombinant expression vectors can be made for constitutive expression or for inducible expression. Further, the recombinant expression vectors can be made to include a suicide gene.
- the term“suicide gene” refers to a gene that causes the cell expressing the suicide gene to die.
- the suicide gene can be a gene that confers sensitivity to an agent, e.g., a drug, upon the cell in which the gene is expressed, and causes the cell to die when the cell is contacted with or exposed to the agent.
- agent e.g., a drug
- Suicide genes are known in the art (see, for example, Suicide Gene Therapy: Methods and Reviews, Springer, Caroline J.
- HSV Herpes Simplex Virus
- TK thymidine kinase gene
- cytosine deaminase purine nucleoside phosphorylase
- nitroreductase nitroreductase
- a host cell comprising any of the recombinant expression vectors or nucleic acid molecules described herein.
- a host cell refers to any type of cell that can contain the disclosed recombinant expression vectors and nucleic acid molecules.
- a host cell produces a polypeptide or TCR, as disclosed herein.
- the host cell can be a eukaryotic cell, e.g., plant, animal, fungi, or algae, or can be a prokaryotic cell, e.g., bacteria or protozoa.
- the host cell can be a cultured cell or a primary cell, i.e., isolated directly from an organism, e.g., a human.
- the host cell can be an adherent cell or a suspended cell, i.e., a cell that grows in suspension.
- Suitable host cells are known in the art and include, for instance, DH5a. E. coli cells, Chinese hamster ovarian cells, monkey VERO cells, COS cells, HEK293 cells, and the like.
- the host cell may be a prokaryotic cell, e.g., a DH5a cell.
- the host cell may be a mammalian cell.
- the host cell may be a human cell. While the host cell can be of any cell type, can originate from any type of tissue, and can be of any developmental stage, the host cell may be a peripheral blood lymphocyte (PBL).
- PBL peripheral blood lymphocyte
- said PBL is a T lymphocyte, or a cell capable of differentiating into a T lymphocyte.
- the T cell can be any T cell, such as a cultured T cell, e.g., a primary T cell, or a T cell from a cultured T cell line, e.g., Jurkat, SupTl, etc., or a T cell obtained from a mammal. If obtained from a mammal, the T cell can be obtained from numerous sources, including but not limited to blood, bone marrow, lymph node, the thymus, or other tissues or fluids. T cells can also be enriched for or purified.
- the T cell may be a human T cell.
- the T cell may be a T cell isolated from a human.
- the T cell can be any type of T cell and can be of any developmental stage, including but not limited to, CD4 + /CD8 + double positive T cells, CD4 + helper T cells, e.g., Thl and Th2 cells, CD8 + T cells (e.g., cytotoxic T cells), peripheral blood mononuclear cells (PBMCs), peripheral blood leukocytes (PBLs), tumor infiltrating cells (TILs), memory T cells, naive T cells, and the like.
- the T cell may be a CD8 + T cell or a CD4 + T cell.
- the population of cells can be a heterogeneous population comprising the host cell comprising any of the recombinant expression vectors described, in addition to at least one other cell, e.g., a host cell (e.g., a T cell), which does not comprise any of the recombinant expression vectors, or a cell other than a T cell, e.g., a B cell, a macrophage, a neutrophil, an erythrocyte, a hepatocyte, an endothelial cell, an epithelial cell, a muscle cell, a brain cell, etc.
- a host cell e.g., a T cell
- a cell other than a T cell e.g., a B cell, a macrophage, a neutrophil, an erythrocyte, a hepatocyte, an endothelial cell, an epithelial cell, a muscle cell, a brain cell, etc.
- the population of cells can be a substantially homogeneous population, in which the population comprises mainly of host cells (e.g., consisting essentially of) comprising the recombinant expression vector.
- the population also can be a clonal population of cells, in which all cells of the population are clones of a single host cell comprising a recombinant expression vector, such that all cells of the population comprise the recombinant expression vector.
- the population of cells is a clonal population comprising host cells comprising a recombinant expression vector as described herein.
- TCRs, polypeptides, and/or proteins disclosed herein can be obtained by methods known in the art.
- polypeptides and proteins can be recombinantly produced using the nucleic acids described herein using standard recombinant methods.
- TCRs, polypeptides, and proteins disclosed herein can be isolated and/or purified from a source, such as a plant, a bacterium, an insect, a mammal, e.g., a rat, a human, etc. Methods of isolation and purification are well-known in the art.
- TCRs, polypeptides, and/or proteins described herein can be commercially synthesized by companies, such as Synpep (Dublin, CA), Peptide Technologies Corp. (Gaithersburg, MD), and Multiple Peptide Systems (San Diego, CA).
- TCR T Cell Receptor
- a method to generate cells expressing the T Cell Receptor (TCR) as defined above comprising the following steps: a) activating a population of lymphocytes obtained from peripheral blood of a subject; b) isolating the T cells from said population; c) transducing, transfecting or transforming the isolated T cells with a nucleic acid as disclosed herein.
- said nucleic acid is comprised in a vector.
- purification methods may be employed.
- the TCRs, polypeptides, proteins (including functional portions and variants thereof), nucleic acids, recombinant expression vectors, host cells (including populations thereof), and antibodies (including antigen binding portions thereof) disclosed herein can be isolated and/or purified.
- the term“isolated” as used herein means having been removed from its natural environment.
- the term“purified” or“isolated” does not require absolute purity or isolation; rather, it is intended as a relative term.
- a purified (or isolated) protein preparation is one in which the protein is purer than the protein in its natural environment within a cell.
- Such proteins may be produced, for example, by standard purification techniques, or by recombinant expression.
- a preparation of a protein is purified such that the protein represents at least 50%, for example at least 70%, of the total protein content of the preparation.
- the purity can be at least about 50%, can be greater than about 60%, about 70% or about 80%, or can be about 100%.
- nucleic acids may be accomplished by any method, including but not limited to, calcium phosphate transfection, DEAE-dextran mediated transfection, cationic lipid-mediated transfection, electroporation, transduction, infection, etc.
- Non-limiting exemplary methods are described, for example, in Sambrook et al, Molecular Cloning, A Laboratory Manual, 3 rd ed. Cold Spring Harbor Laboratory Press (2001).
- Nucleic acids may be transiently or stably transfected in the desired host cells, according to any suitable method.
- the TCRs, polypeptides, proteins (including functional portions and variants thereof), nucleic acids, recombinant expression vectors, host cells (including populations thereof), and antibodies (including antigen binding portions thereof) disclosed herein can be formulated into a composition, such as a pharmaceutical composition.
- a pharmaceutical composition comprising any of the TCRs, polypeptides, proteins, functional portions, functional variants, nucleic acids, expression vectors, host cells (including populations thereof), and antibodies (including antigen binding portions thereof), and a pharmaceutically acceptable carrier.
- the pharmaceutical compositions disclosed herein comprise more than one TCR material disclosed herein, e.g., a polypeptide and a nucleic acid (such as in a host cell comprising the nucleic acid and expressing the polypeptide), or two or more different TCRs.
- a TCR material disclosed herein e.g., a polypeptide and a nucleic acid (such as in a host cell comprising the nucleic acid and expressing the polypeptide), or two or more different TCRs.
- composition can comprise a TCR material disclosed herein in combination with another pharmaceutically active agents or drugs, such as a chemotherapeutic agent, e.g., asparaginase, busulfan, carboplatin, cisplatin, daunorubicin, doxorubicin, fluorouracil, gemcitabine, hydroxyurea, methotrexate, paclitaxel, rituximab, vinblastine, vincristine, etc.
- chemotherapeutic agent e.g., asparaginase, busulfan, carboplatin, cisplatin, daunorubicin, doxorubicin, fluorouracil, gemcitabine, hydroxyurea, methotrexate, paclitaxel, rituximab, vinblastine, vincristine, etc.
- a pharmaceutical composition comprises between 10 1 to 10 10 host cells as disclosed herein, that produces a polypeptide or TCR, as disclosed herein.
- a pharmaceutical composition disclosed herein that produces a polypeptide or TCR, as disclosed herein.
- at least 50% of the cells in the pharmaceutical composition are host cells as disclosed herein that produces a polypeptide or TCR, as disclosed herein.
- at least 75% of the cells in the pharmaceutical composition are host cells as disclosed herein that produces a polypeptide or TCR, as disclosed herein.
- at least 90% of the cells in the pharmaceutical composition are host cells as disclosed herein that produces a polypeptide or TCR, as disclosed herein.
- a pharmaceutical composition disclosed herein in a pharmaceutical composition disclosed herein, at least 95% of the cells in the pharmaceutical composition are host cells as disclosed herein that produces a polypeptide or TCR, as disclosed herein. In some embodiments, in a pharmaceutical composition disclosed herein, at least 99% of the cells in the pharmaceutical composition are host cells as disclosed herein that produces a polypeptide or TCR, as disclosed herein.
- the TCR materials disclosed herein can be modified in any number of ways, such that the therapeutic or prophylactic efficacy of the inventive TCR materials is increased through the modification.
- the inventive TCR materials can be conjugated either directly or indirectly through a linker to a targeting moiety.
- the practice of conjugating compounds, e.g., inventive TCR materials, to targeting moieties is known in the art. See, for instance, Wadhwa et al, J. Drug Targeting 3: 111-127 (1995) and U.S. Patent No. 5,087,616.
- targeting moiety refers to any molecule or agent that specifically recognizes and binds to a cell-surface receptor, such that the targeting moiety directs the delivery of the inventive TCR materials to a population of cells on which surface the receptor is expressed.
- Targeting moieties include, but are not limited to, antibodies, or fragments thereof, peptides, hormones, growth factors, cytokines, and any other natural or non-natural ligands, which bind to cell surface receptors (e.g., Epithelial Growth Factor Receptor (EGFR), T-cell receptor (TCR), B- cell receptor (BCR), CD28, Platelet-derived Growth Factor Receptor (PDGF), nicotinic acetylcholine receptor (nAChR), etc.) ⁇
- EGFR Epithelial Growth Factor Receptor
- TCR T-cell receptor
- BCR B- cell receptor
- CD28 CD28
- PDGF Platelet-derived Growth Factor Receptor
- nAChR nicotinic acetylcholine receptor
- sites on the inventive TCR materials which are not necessary for the function of the inventive TCR materials, are ideal sites for attaching a linker and/or a targeting moiety, provided that the linker and/or targeting moiety, once attached to the inventive TCR materials, do(es) not interfere with the function of the inventive TCR materials, i.e., the ability to bind to antigen, or to detect, treat, or prevent disease.
- a pharmaceutical composition comprising a host cell, as described, and a pharmaceutically acceptable carrier and/or adjuvant.
- the pharmaceutical composition comprises between 10 1 to 10 10 host cells described herein.
- compositions for use in the methods of treatment disclosed herein are also disclosed herein.
- the pharmaceutically acceptable carrier can be any of those conventionally used and is limited only by chemico-physical considerations, such as solubility and lack of reactivity with the active(s), and by the route of administration.
- the pharmaceutically acceptable carriers described herein, for example, vehicles, adjuvants, excipients, and diluents, are well-known to those skilled in the art and are readily available to the public.
- the pharmaceutically acceptable carrier is one which is chemically inert to the active agent(s) and one which has no detrimental side effects or toxicity under the conditions of use.
- the choice of carrier will be determined in part by the particular TCR material, as well as by the particular method used to administer the TCR material. Accordingly, there are a variety of suitable formulations of the pharmaceutical composition disclosed herein.
- Preservatives may be used. Suitable preservatives may include, for example, methylparaben, propylparaben, sodium benzoate, and benzalkonium chloride. A mixture of two or more preservatives optionally may be used. The preservative or mixtures thereof are typically present in an amount of about 0.0001% to about 2% by weight of the total composition.
- Suitable buffering agents may include, for example, citric acid, sodium citrate, phosphoric acid, potassium phosphate, and various other acids and salts. A mixture of two or more buffering agents optionally may be used. The buffering agent or mixtures thereof are typically present in an amount of about 0.001% to about 4% by weight of the total composition.
- the concentration of TCR material in the pharmaceutical formulations can vary, e.g., from less than about 1%, usually at or at least about 10%, to as much as 20% to 50% or more by weight, and can be selected primarily by fluid volumes, and viscosities, in accordance with the particular mode of administration selected.
- Methods for preparing administrable (e.g., parenterally administrable) compositions are known or apparent to those skilled in the art and are described in more detail in, for example, Remington: The Science and Practice of Pharmacy, Lippincott Williams & Wilkins; 2lst ed. (May 1, 2005).
- an“effective amount” or“an amount effective to treat” refers to a dose that is adequate to prevent or treat cancer in an individual. Amounts effective for a therapeutic or prophylactic use will depend on, for example, the stage and severity of the disease or disorder being treated, the age, weight, and general state of health of the patient, and the judgment of the prescribing physician. The size of the dose will also be determined by the active selected, method of administration, timing and frequency of administration as well as the existence, nature, and extent of any adverse side-effects that might accompany the administration of a particular active and the desired physiological effect. It will be appreciated by one of skill in the art that various diseases or disorders could require prolonged treatment involving multiple administrations, using the TCR materials in each or various rounds of administration.
- compositions for oral, aerosol, parenteral (e.g., subcutaneous, intravenous, intraarterial, intramuscular, intradermal, interperitoneal, and intrathecal), and rectal administration are merely exemplary and are in no way limiting. More than one route can be used to administer the TCR materials, and in certain instances, a particular route can provide a more immediate and more effective response than another route.
- Formulations suitable for parenteral administration include aqueous and nonaqueous isotonic sterile injection solutions, such as sterile water for injection, which can contain antioxidants, buffers, bacteriostats, and solutes that render the formulation isotonic with the blood of the intended recipient, and aqueous and nonaqueous sterile suspensions that can include suspending agents, solubilizers, thickening agents, stabilizers, and preservatives.
- sterile water for injection which can contain antioxidants, buffers, bacteriostats, and solutes that render the formulation isotonic with the blood of the intended recipient
- aqueous and nonaqueous sterile suspensions that can include suspending agents, solubilizers, thickening agents, stabilizers, and preservatives.
- parenteral formulations can be presented in unit-dose or multi-dose sealed containers, such as ampoules and vials, and can be stored in a freeze-dried (lyophilized) condition requiring only the addition of the sterile liquid excipient, for example, water, for injections, immediately prior to use.
- sterile liquid excipient for example, water
- Extemporaneous injection solutions and suspensions can be prepared from sterile powders, granules, and tablets of the kind previously described.
- a pharmaceutical composition disclosed herein is an injectable formulation.
- the requirements for effective pharmaceutical carriers for injectable compositions are well-known to those of ordinary skill in the art (see, e.g., Pharmaceutics and Pharmacy Practice, J.B. Lippincott Company, Philadelphia, PA, Banker and Chalmers, eds., pages 238-250 (1982), and ASHP Handbook on Injectable Drugs, Toissel, 4th ed., pages 622- 630 (1986)).
- the inventive TCR material alone or in combination with other suitable components, can be made into aerosol formulations to be administered via inhalation.
- aerosol formulations can be placed into pressurized acceptable propellants, such as dichlorodifluoromethane, propane, nitrogen, and the like. They also may be formulated as pharmaceuticals for non-pressured preparations, such as in a nebulizer or an atomizer. Such spray formulations also may be used to spray mucosa.
- propellants such as dichlorodifluoromethane, propane, nitrogen, and the like.
- non-pressured preparations such as in a nebulizer or an atomizer.
- Such spray formulations also may be used to spray mucosa.
- inventive TCR materials can be made into suppositories by mixing with a variety of bases, such as emulsifying bases or water-soluble bases.
- bases such as emulsifying bases or water-soluble bases.
- Formulations suitable for vaginal administration can be presented as pessaries, tampons, creams, gels, pastes, foams, or spray formulas containing, in addition to the active ingredient, such carriers as are known in the art to be appropriate.
- the amount or dose of the inventive TCR material administered should be sufficient to effect, e.g., a therapeutic or prophylactic response, in the subject or animal over a reasonable time frame.
- the dose of the inventive TCR material should be sufficient to bind to antigen, or detect, treat or prevent disease.
- the dose of the inventive TCR material also will be determined by the existence, nature and extent of any adverse side effects that might accompany the administration of a particular inventive TCR material. Typically, the attending physician will decide the dosage of the inventive TCR material with which to treat each individual patient, taking into consideration a variety of factors, such as age, body weight, general health, diet, sex, inventive TCR material to be administered, route of administration, and the severity of the condition being treated.
- an assay which comprises comparing the extent to which target cells are lysed or IFN-g is secreted by T cells expressing the inventive TCR, polypeptide, or protein upon administration of a given dose of such T cells to a mammal among a set of mammals of which is each given a different dose of the T cells, could be used to determine a starting dose to be administered to a mammal.
- the extent to which target cells are lysed or IFN -g is secreted upon administration of a certain dose can be assayed by methods known in the art.
- the cells can be cells that are allogeneic or autologous to the host.
- the cells may be autologous to the host.
- the inventive TCR materials can be formulated as inclusion complexes, such as cyclodextrin inclusion complexes, or liposomes.
- Liposomes can serve to target the inventive TCR materials to a particular tissue. Liposomes also can be used to increase the half-life of the inventive TCR materials. Many methods are available for preparing liposomes, as described in, for example, Szoka e/ a/., Ann. Rev. Biophys. Bioeng., 9, 467 (1980) and U.S. Patents 4,235,871, 4,501,728, 4,837,028, and 5,019,369.
- inventive composition can be used in conjunction with other therapeutic agents or therapies.
- Such systems can avoid repeated administrations of the inventive composition, thereby increasing convenience to the subject and the physician, and may be particularly suitable for certain composition embodiments disclosed herein.
- release delivery systems are available and known to those of ordinary skill in the art. They include polymer base systems such as poly(lactide-glycolide), copoly oxalates, polycaprolactones, polyesteramides, polyorthoesters, polyhydroxybutyric acid, and polyanhydrides. Microcapsules of the foregoing polymers containing drugs are described in, for example, U.S. Patent 5,075,109.
- Delivery systems also include non-polymer systems that are lipids including sterols such as cholesterol, cholesterol esters, and fatty acids or neutral fats such as mono-di-and tri-glycerides; hydrogel release systems; sylastic systems; peptide based systems; wax coatings; compressed tablets using conventional binders and excipients; partially fused implants; and the like.
- lipids including sterols such as cholesterol, cholesterol esters, and fatty acids or neutral fats such as mono-di-and tri-glycerides
- hydrogel release systems such as sterols such as cholesterol, cholesterol esters, and fatty acids or neutral fats such as mono-di-and tri-glycerides
- sylastic systems such as cholesterol, cholesterol esters, and fatty acids or neutral fats such as mono-di-and tri-glycerides
- peptide based systems such as fatty acids or neutral fats such as mono-di-and tri-glycerides
- hydrogel release systems such
- pump-based hardware delivery systems can be used, some of which are adapted for implantation.
- inventive pharmaceutical compositions TCRs, polypeptides, proteins, nucleic acids, recombinant expression vectors, host cells, or populations of cells can be used in methods of treating or preventing a disease in a host.
- inventive TCRs have biological activity, e.g., ability to recognize antigen, such that the TCR (or related inventive polypeptide or protein) when expressed by a cell is able to mediate an immune response against the cell expressing the antigen for which the TCR is specific.
- a method of treating or preventing a disease in a host comprising administering to the host any of the pharmaceutical compositions in an amount effective to treat or prevent the disease in the host.
- a method of treating and/or preventing a cell proliferation-related disorder in a subject comprising administering to the subject a pharmaceutical composition as disclosed herein.
- the cell proliferation- related disorder can be any disorder wherein mutant IDH1 is expressed.
- cell proliferation related-disorder refers to any malignant neoplasm resulting from the undesired growth and under certain conditions the invasion and/or metastasis of impaired cells in an organism.
- the cells giving rise to the cell proliferation related-disorder are genetically impaired and have usually lost their ability to control cell division, cell migration behavior, differentiation status and/or cell death machinery.
- Most cell proliferation related-disorders form a tumor, but some hematopoietic cancers, such as leukemia, do not.
- the cell proliferation-related disorder is chosen from a glioma, a leukemia, prostate cancer, fibrosarcoma, paraganglioma, myelodysplasia or myelodysplastic syndrome.
- said cell proliferation related-disorder is characterized by having a mutation in the genome of at least some cancer cells which results in the expression of a mutant IDH1 having the R132H mutation. Whether a cancer has a mutation in at least some of the cancer cells as specified before can be determined by the skilled artisan by PCR-based and/or sequencing based detection techniques.
- the cell proliferation-related disorder is a tumor of the CNS, such as a glioma. Gliomas have been reported to frequently comprise cells or even consist of cells comprising the aforementioned IDH1 mutation.
- the said glioma is WHO II or WHO III astrocytoma, oligodendroglioma, oligoastrocytoma, glioblastoma, or gliosarcoma.
- the glioma is a low-grade glioma.
- the glioma comprises the R132H mutation of IDH1.
- inventive methods can provide any amount of any level of treatment or prevention of cancer in a mammal.
- the treatment or prevention provided by the inventive method can include treatment or prevention of one or more conditions or symptoms of the disease, e.g., cancer, being treated or prevented.
- the pharmaceutical composition is administered intrathecally, epidurally, intracerebrally, or intracerebroventicularly.
- the amounts or dose of the inventive TCR material administered should be sufficient to effect, e.g., a therapeutic or prophylactic response, in the subject or animal over a reasonable time frame.
- the dose of the inventive TCR material should be sufficient to bind to antigen, or detect, treat or prevent disease in a period of from about 2 hours or longer, e.g., 12 to 24 or more hours, from the time of administration. In certain embodiments, the time period could be even longer.
- the dose will be determined by the efficacy of the particular inventive TCR material and the condition of the animal (e.g., human), as well as the body weight of the animal (e.g., human) to be treated.
- the dose of the inventive TCR material also will be determined by the existence, nature and extent of any adverse side effects that might accompany the administration of a particular inventive TCR material. Typically, the attending physician will decide the dosage of the inventive TCR material with which to treat each individual patient, taking into consideration a variety of factors, such as age, body weight, general health, diet, sex, inventive TCR material to be administered, route of administration and the severity of the condition being treated.
- the dose of the inventive TCR material can be about 0.001 to about 1000 mg/kg body weight of the subject being treated/day, from about 0.01 to about 10 mg/kg body weight/day, about 0.01 mg to about 1 mg/kg body weight/day.
- an assay which comprises comparing the extent to which target cells are lysed or IFN-g is secreted by T cells expressing the inventive TCR, polypeptide, or protein upon administration of a given dose of such T cells to a mammal among a set of mammals of which is each given a different dose of the T cells, could be used to determine a starting dose to be administered to a mammal.
- the extent to which target cells are lysed or IFN-g is secreted upon administration of a certain dose can be assayed by methods known in the art.
- inventive TCR materials are administered with one or more additional therapeutic agents
- one or more additional therapeutic agents can be coadministered to the mammal.
- coadministering is meant administering one or more additional therapeutic agents and the inventive TCR materials sufficiently close in time such that the inventive TCR materials can enhance the effect of one or more additional therapeutic agents.
- the inventive TCR materials can be administered first and the one or more additional therapeutic agents can be administered second, or vice versa.
- the inventive TCR materials and the one or more additional therapeutic agents can be administered simultaneously.
- the cells can be cells that are allogeneic or autologous to the host.
- the cells may be autologous to the host.
- the cells autologous to the host T cells from the host, or T cells derived from cells from the host.
- kits comprising at least one pharmaceutical composition, TCR, polypeptide, protein, nucleic acid, recombinant expression vector, host cell, or population of cells as disclosed herein.
- a kit comprises at least one vector coding for at least one polypeptide disclosed herein.
- a kit comprises one or more vectors coding for a TCR, as disclosed herein.
- kit shall encompass an entity of physically separated components, which are intended for individual use, but in functional relation to each other. This means that the individual parts of the kit are provided for simultaneous or subsequent use or administration.
- TCR T Cell Receptor
- IDH1 isocitrate dehydrogenase type 1
- TCR or fragment thereof of embodiment 1 or 2 further comprising a TRAV26 alpha chain or a fragment thereof, optionally, wherein the TRAV26 alpha chain comprises a sequence encoded by some or all of a TRAV26-l*02 germline allele or a TRAV26-2*0l germline allele.
- the TCR or fragment thereof of embodiment 1 or 2 further comprising a TRAV16 alpha chain or a fragment thereof, optionally, wherein the TRAV16 alpha chain comprises a sequence encoded by some or all of a TRBV 16*01 germline allele.
- TCR TCR or fragment thereof of embodiment 4, wherein the TRAV16 alpha chain comprises an asparagine amino acid residue (N) at position 81.
- TCR alpha chain or a fragment thereof comprising a CDR3 sequence of a TCR alpha chain polypeptide sequence of SEQ ID NO: 2, 18, 34, or a variant thereof differing by no more than one, two, three, or four amino acids within the TCR alpha chain CDR3 sequence; and/or
- TCR beta chain or a fragment thereof comprising a CDR3 sequence of a TCR beta chain polypeptide sequence of SEQ ID NO: 10, 26, or a variant thereof differing by no more than one, two, three, or four amino acids within the TCR beta chain CDR3 sequence.
- MHC major histocompatibility
- the TCR or fragment thereof of any one of embodiments 1, 2 and 5 to 7, wherein the TCR alpha chain or fragment thereof comprises the polypeptide sequence of SEQ ID NO: 8.
- the TCR or fragment thereof of any one of embodiments 1 to 12 further comprising at least one sequence chosen from:
- the TCR or fragment thereof of embodiment 24, wherein the TCR alpha chain comprises the polypeptide sequence of SEQ ID NO: 34.
- the TCR of fragment thereof of any one of embodiments 24 to 26, wherein the TCR beta chain comprises the polypeptide sequence of SEQ ID NO: 10.
- TCR alpha chain a T-cell receptor (TCR) alpha chain, or a fragment thereof comprising a TCR alpha chain CDR3 polypeptide sequence
- TCR alpha chain is encoded by a nucleic acid sequence of SEQ ID NO: 1, 17, 33, or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or 21 nucleotides (or nucleosides) within the sequence encoding the TCR alpha chain CDR3 polypeptide sequence; and/or
- TCR beta chain a T-cell receptor (TCR) beta chain, or a fragment thereof comprising a TCR beta chain CDR3 polypeptide sequence
- TCR beta chain is encoded by a nucleic acid sequence of SEQ ID NO: 9, 25, or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or 21 nucleotides (or nucleosides) within the sequence encoding the TCR beta chain CDR3 polypeptide sequence
- TCR or fragment thereof comprising the TCR alpha chain and/or the TCR beta chain binds to a fragment of an isocitrate dehydrogenase type 1 (IDH1) protein comprising the R132H mutation.
- IDH1 isocitrate dehydrogenase type 1
- MHC major histocompatibility
- the nucleic acid molecule of embodiment 32 or 33, wherein the TCR or fragment thereof does not bind to IDH1 or a fragment thereof comprising an arginine at amino acid position 132.
- nucleic acid molecule of any one of embodiments 32 to 37 wherein the TCR alpha chain is encoded by a nucleic acid sequence comprising the sequence of SEQ ID NO: 5, 21, 37, or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 nucleotides (or nucleosides).
- TCR alpha chain is encoded by a nucleic acid sequence comprising the sequence of SEQ ID NO: 5, 21, 37, or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 nucleotides (or nucleosides).
- sequence of SEQ ID NO: 5 or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 nucleotides (or nucleosides);
- sequence of SEQ ID NO: 35 or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 nucleotides (or nucleosides);
- sequence of SEQ ID NO: 37 or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, or 9 nucleotides (or nucleosides);
- sequence of SEQ ID NO: 39 or a variant thereof differing by no more than 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, or 21 nucleotides (or nucleosides).
- nucleic acid molecule of any one of embodiments 32 to 40 and 44, wherein the
- TCR beta chain is encoded by a nucleic acid sequence that comprises:
- nucleic acid molecule of any one of embodiments 32 to 47 wherein the nucleic acid molecule comprises at least one variant, and wherein the variant is at least 80% identical (e.g., at least 85%, 90%, 95%, or 99% identical) to at least 60% (e.g., at least 70%, 80%, 90%, or 100%) of the sequence of SEQ ID NO: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, or 39.
- the nucleic acid molecule of embodiment 49 wherein the TCR alpha chain is encoded by a nucleic acid sequence comprising the sequence of each of SEQ ID NOs: 19, 21 and 23.
- the nucleic acid molecule of any one of embodiments 32 to 34 comprising the sequence of SEQ ID NO: 1 and/or SEQ ID NO: 9.
- the nucleic acid molecule of any one of embodiments 32 to 34 comprising the sequence of SEQ ID NO: 33 and/or SEQ ID NO: 9.
- nucleic acid molecule of any one of embodiments 32 to 34 comprising the sequence of SEQ ID NO: 17 and/or SEQ ID NO: 25. 58.
- a recombinant expression vector comprising a nucleic acid of any one of embodiments 31 to 57.
- the recombinant expression vector of embodiment 59 or 60 comprising an inducible or constitutive promoter.
- peripheral blood lymphocyte is a T lymphocyte, or a cell capable of differentiating into a T lymphocyte.
- a pharmaceutical composition comprising a host cell of any one of embodiments 63 to 66, and a pharmaceutically acceptable carrier and/or adjuvant.
- composition of embodiment 67 comprising between 10 3 to 10 10 host cells of any one of embodiments 54 to 57.
- composition of embodiment 67 or 68, wherein at least 50% of the cells in the pharmaceutical composition are host cells of any one of embodiments 63 to 66.
- TCR T Cell Receptor
- transducing, transfecting or transforming the isolated T lymphocytes with a nucleic acid molecule as embodimented in any of embodiments 31 to 58, or a vector as embodied in any of embodiments 59 to 62.
- a method of treating a cell proliferation-related disorder in a subject comprising administering to the subject a pharmaceutical composition as embodied in any of embodiments 67 to 69.
- the cell proliferation-related disorder is chosen from a glioma, a leukemia, prostate cancer, fibrosarcoma, paraganglioma, myelodysplasia or myelodysplastic syndrome.
- a pharmaceutical composition for use in treating a cell-proliferation related disorder comprising a host cell of any of embodiments 63 to 66, and a pharmaceutically acceptable carrier and/or adjuvant.
- composition of embodiment 84, wherein the cell proliferation-related disorder is chosen from a glioma, a leukemia, prostate cancer, fibrosarcoma, paraganglioma, myelodysplasia or myelodysplastic syndrome.
- peripheral blood mononuclear cells were isolated from whole blood of a healthy human subject, HLADRBl*04:03 + .
- the isolated PBMCs were seeded in the wells of a 24-well plate in RPMI containing 5% human serum, 10 U/mL interleukin 2 (IL-2) and 5 ng/mL interleukin 7 (IL-7).
- the medium was supplemented with 10 pg/mL IDH1 R132H mutant peptide antigen (GWVKPIIIGHHAY GDQYRAT ; SEQ ID NO: 41).
- the IDH1 R132H mutant peptide was provided for uptake by dendritic cells, which could then stimulate the activation and proliferation of T cells having TCRs that specifically recognize the peptide.
- the cell culture medium was supplemented with IL-2, which was added to 10 U/mL, and IL-7, which was added to 5 ng/mL.
- PBMCs PBMCs (same donor) and additional IDH1 R132H mutant peptide antigen (10 pg/mL) was added to each well.
- the cell culture medium was also supplemented with IL-7, which was added to 5 ng/mL.
- the cell culture medium was again supplemented with additional IL-2, which was added to 5 U/mL, and IL-7, which was added to 5 ng/mL.
- Example 3 Antigen-Specific Expansion of Human T Cells in a Nanofluidic Device
- Example 2 On day 18 (relative to the protocol of Example 2), a frozen sample of -10 million PBMCs, obtained from the same human subject as in Example 2, was thawed. Human CDl4 + monocytes were isolated from the thawed PBMCs using the EasySepTM Human Monocyte Enrichment Kit (Stemcell), then cultured for 7 days in DC culture medium (RPMI, 10% FBS, 2% Human AB serum, 100 ng/ml GM-CSF, 50 ng/ml IL-4) (R&D Systems) to promote differentiation of dendritic cells (DCs), substantially as described in Example 2 of International Patent Application PCT/US2017/22846, filed March 16, 2017, the entire contents of which is incorporated herein by reference.
- DC culture medium RPMI, 10% FBS, 2% Human AB serum, 100 ng/ml GM-CSF, 50 ng/ml IL-4
- the chip also included a plurality of microfluidic channels, each having a plurality of NanoPenTM chambers (or sequestration pens) fluidically connected thereto.
- the volume of each sequestration pen was around lxlO 6 cubic microns (or lnL).
- the T cells/DCs resuspension was introduced into the chip by flowing the resuspension through a fluidic inlet and into the microfluidic channel.
- T cells/DCs were randomly loaded into the sequestration pens by tilting the chip and allowing gravity to pull the T cells/DCs into isolation regions located within the sequestration pens.
- T cell culture medium (RPMI, 10% FBS, 2% Human AB serum, 50 U/ml IL2) (R&D Systems) was perfused through the microfluidic channel(s) of the chip for a period of 5 days.
- the sequestration pens and any T cells contained therein were imaged every 30 minutes for the entire 5-day culture period. Approximates 3% of the sequestration pens containing T cells exhibited T cell growth during the 5-day culture period, suggesting that the T cell growth was triggered in an antigen-specific manner.
- T cells that expanded under the foregoing conditions were exported into individual wells of a well plate and their TCR genes were sequenced. TCR sequences from the cells of three such wells (Al, A3, and Cl) are presented in Example 1, above.
- TRAV and TRBV allele frequencies from the exported T cells in six wells are shown in Figure 1.
- cells from five of the six wells included both a TRAV26 allele and a TRBV9 allele, and the TRBV9 alleles in wells Al and Cl were identical.
- four of the six wells included a TRAV16 allele; and three of the six wells (A5, C3, and C5) included a TRBV27 allele.
- TRBV9 beta chains included distinct CDR3 sequences as compared to the CDR3 sequence (SEQ ID NO: 18) of the TRBV9 beta chain (SEQ ID NO: 10) identified in wells Al and Cl of the experiment described above but arise from the same germline sequence (TRBV9*0l), while the TRAV26 alpha chains arise from TRAV26-l*02 and TRAV26-2*0l germline sequences.
- the TRBV9 beta chain (optionally, comprising some or all of the amino acids encoded by a TRBV9*0l germline sequence) has a propensity for binding to the IDH1 R132H mutant peptide
- the TRAV26 alpha chain (optionally, comprising some or all of the amino acids encoded by a TRAV26-l*02 germline sequence or a TRAV26-2*0l germline sequence)
- the TRAV16 alpha chains (optionally, comprising some or all of the amino acids encoded by a TRAVl6*0l germline sequence, wherein the TRAV16 alpha chain may include an asparagine residue at position 81) are able to support/enhance the binding of the TRBV9 beta chain to the IDH1 R132H mutant peptide.
- Example 4 Transduction and functional activation of isolated T-cells from murine splenocytes
- T cells isolated from murine splenocytes are transduced using retroviral vectors properly engineered and encoding a TCR specific for an R1321H IDH1 mutant, as described above in Example 1. Expression of the transduced TCR is assayed through cytofluorimetric analysis. The percentage of Vbl3 positive cells in the non-transduced splenocytes corresponds to the normal TCR variable repertoire, and the increase in this percentage in the transduced cells indicates that the cells have been successfully infected and express the R132H IDE! 1 -specific TCR. The cytotoxic activity of the transduced cells against target cells loaded with the IDH1 R132H mutant peptide GWVKPIIIGHHAY GDQYRAT (SEQ ID NO: 41) is measured through a calcein release assay.
- Transduced mouse splenocytes expressing an R132H IDE! 1 -specific TCR are analyzed for their ability to recognize target cells.
- the IFNy production by transduced splenocytes cocultured with antigen presenting cells pre pulsed with mutant R132H IDH1 mutant polypeptide is assayed.
- CD8 + splenocytes transduced with the retroviral vector encoding a R132H IDE! 1 -specific TCR, as described herein, are expected to produce higher amounts of IFNy when cocultured with R132H IDH1 antigen presenting cells, as compared to control transduced CD8 + T cells.
- human CD8 + T cells transduced with a R132H IDF11 -specific TCR are expected to produce higher amounts of IFNy when cocultured with human antigen presenting cells that have been exposed to mutant R132H IDH1 polypeptide.
- Jurkat 76 cells were transduced with TCR vectors engineered to express paired TCR a- and b-chains identified in Example 3 (above).
- Jurkat 76 cells are a human T cell lymphoma cell line that is deficient for endogenous TCR a and b chains, allowing a specific assessment of transgene TCR reactivity.
- Figure 2 because expression of CD3 requires TCR a/b expression, non-transduced Jurkat 76 cells are negative for CD3.
- Jurkat 76 cells transduced with a TCR vector (GFP + cells) express CD3 as a measure of accurate formation of TCR.
- the transduced Jurkat 76 cells shown in Figure 1 express a TCR that includes the Al a-chain (TRAV26-1, see Example 1) and the Al b-chain (TRBV9, see Example 1), hereafter referred to as TCR clone 26-9.
- TCR clone 26-9 Two additional TCRs were successfully expressed in Jurkat 76 cells (data not shown), including: (i) TCR clone 5- 20, containing the A3 a-chain (TRAV5, see Example 1) and the A3 b-chain (TRBV20-1, see Example 1); and (ii) TCR clone 16-9, containing the Cl a-chain (TRAV16) and the Cl b- chain (TRBV9).
- CD4 + T-cells isolated from the peripheral blood of a HLADRB1* 01 :0l + donor were transduced with lentiviral constructs encoding IDHl(Rl32H)-reactive TCRs identified in Example 3. Binding of the TCR-transduced CD4 + T-cells to HLA-DRl-IDHl(Rl32) tetramer was evaluated for all six TCR clones. TCR clones 26-9, 16-9, and 5-20, which produced the most reproducible positive staining against the tetramer (data not shown), were selected for further functional evaluations.
- the TCR-transduced CD4 + T cells were co-cultured for 20 hours with autologous monocytes/B cells pulsed with 10 pg/ml IDH1 peptide (wild-type (wt) or containing the R132H mutation (mut)).
- Supernatants from the co-cultures were analyzed by ELISA for IFN-g, TNF-a, and IL-2 production levels.
- IFN- g levels were dramatically increased in supernatants for 26-9 and 5-20 clones when exposed to the IDHl(Rl32H;l23-l42) epitope peptide, as compared to exposure to control, wild-type peptide (Figure 3B; shown for the 26- 9 clone only).
- NanoPenTM chambers within nanofluidic chips were used to selectively expand CD4 + T-cells that specifically recognize the IDHl(Rl32H) epitope peptide.
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